This type of sleek strapless jumpsuit was common in the 70s and they usually came with some sort of chiffon over-tunic (I know because I had one!). Probably not pajamas or loungewear, but the knit is so sheer that could be your first thought. Poly knit, much like sheer Qiana, elastic upper bust, and waist is very stretchy! Straight legs. Just a bow (not a drawstring) on the waist, no other details. No maker label. Simple minimalist look, but WHAT FUN to accessorize! I have an amazing gold sequin jacket on this same page...(hint-hint)
No flaws. PS: the mannequin is size 8, stated size is 9.
ON SALE? It could be. Private sales are done here from time to time so look for a dark pink sale banner with a discount code (percentage off) on any of my shop pages. Individual items do not show sale prices during private (non-site-wide) sales.
MEASUREMENTS

bust (upper bust band) 24-40"

waist 22-36"

hip 39" unstretched (add up to 3 " for stretch)

inseam 32"
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This item is sold from an excellent, highly rated vintage boutique in Northfield, OH.